Tag: food spoilage, adulteration and preservation

Questions Related to food spoilage, adulteration and preservation

Pasteurized milk can be consumed without boiling why?

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. As it is free from enzymes

  2. As it is free from microbes

  3. As it is free from preservatives

  4. Both A and B

Show answer
Correct Option: B
Explanation:

Pasteurized milk can be consumed without boiling as it free from harmful microbes. The process was discovered by Louis Pasteur.

Oil and vinegar is used for preservation for

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. Vegetables

  2. Fish

  3. Meat

  4. All of the above

Show answer
Correct Option: D
Explanation:

Vegetables, fruits, fish and meat are often preserved by this method. It prevents the growth of bacteria.

Match the columns

a) Aspergillus 1) Chemical preservative
b) KMS 2) Acetic acid
c) Vinegar 3) Food poisoning
evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. $a-1,b-2,c-3$

  2. $a-2,b-1,c-3$

  3. $a-3,b-1,c-2$

  4. $a-1,b-3,c-2$

Show answer
Correct Option: C
Explanation:
  • Aspergillus causes food poisoning.
  • KMS(Potassium Mera Bisulphate) is a chemical preservative.
  • Acetic acid in the form of vinegar is used in the manufacture of several pickled products.

Common preservative used in jam and pickles is ________

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. Sodium benzoate

  2. Nitric acid

  3. Sodium chloride

  4. Copper sulphate

Show answer
Correct Option: A
Explanation:

There are many chemical preservatives used in food industry. Sodium benzoate is generally used is ketchups, pickles, jams etc.

Which of the following is used as chemical preservatives ?

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. Citric acid

  2. Nitric acid

  3. Oxalic acid

  4. All of the above

Show answer
Correct Option: A
Explanation:

Citric acid and phosphoric acid are added to carbonated beverages and fruit drinks for both flavoring and preservation. Nitric acid and Oxalic acid are much acidic in nature which can cause harm to the digestion system.

Why salts and edible oils are known as preservatives ?

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. Because they can kill all microbes even the viruses

  2. They checks the growth of microbes

  3. They are tasty

  4. Both A and B

Show answer
Correct Option: B
Explanation:

Salts and edible oils are the common chemicals generally used to check the growth of microorganisms. Therefore they are called preservatives.

Mark the correct statement:
a) Pasteurized milk can be consumed without boiling as it is free from harmful microbes
b) The milk is heated to about $700^{\circ}C$ for $15$ to $30$ seconds and then suddenly chilled and stored
c) Pasteurization prevents the growth of microbes

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. a, b

  2. b, c

  3. a, c

  4. All of the above

Show answer
Correct Option: D
Explanation:

Pasteurized milk can be consumed without boiling as it is free from harmful microbes. The milk is heated to about $700C$ for $15$ to $30$ seconds and then suddenly chilled and stored. By doing so, it prevents the growth of microbes. This process was discovered by Louis Pasteur. So, It is called pasteurization.

Purpose of milk pasteurization

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. Strips bacteria of oxygen

  2. Make the milk tasty for drinking

  3. Destroy microbes

  4. All of the above

Show answer
Correct Option: C
Explanation:

Milk is pasteurized to destroy microbes, but many more heat resistant organisms are only reduced in number. Pasteurization kills the harmful microorganisms present in milk..

Mark the incorrect statement

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. Salts and edible oils are the common chemicals generally used to check the growth of viruses.

  2. We add salt or acid preservatives to pickles to prevent the attack of microbes.

  3. Sodium benzoate and sodium metabisulphite are common chemical preservatives.

  4. All of the above

Show answer
Correct Option: A
Explanation:

Salts and edible oils are the common chemicals generally used to check the growth of microorganisms. Therefore, they are called  preservatives. We add salt or acid preservatives to pickles to prevent the attack of microbes. Sodium benzoate and sodium metabisulphite are common preservatives. These are also used in the jams and squashes to check their spoilage.

Which of the following causes food poisoning ?

evs eat when you need food poisoning and food preservation methods food spoilage, adulteration and preservation food spoilage and adulteration

  1. Aspergillus

  2. Rhizopus

  3. Xanthomaonas

  4. All of the above

Show answer
Correct Option: A
Explanation:

The symptoms of food poisoning arise due to the presence of bacteria or other microbes in food and due to the ingestion of toxins contained in food. Some bacteria like Clostridium and Staphylococci and fungi like Aspergillus cause food poisoning.